Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Membrane extraction"”.
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Development of membrane extraction techniques for water quality analysis
This research involved the development of membrane-based analytical techniques as applied to various aspects of water quality analysis. Gas injection membrane extraction was developed for fast on-line analysis of volatile organic compounds in water. Gas injection of aqueous samples increased the …
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Development of micro-scale and automated membrane extraction systems for water analysis
… trace level contaminants in water involves the extraction and enrichment of analytes. Over the years several techniques have been developed for this purpose. Currently there is an urgent need for the development of micro-scale extraction techniques that can lead to simple, fast trace analysis. …
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Sequential Actions of VCP/p97 and the Proteasome 19S Regulatory Particle in Sterol-Accelerated, ER-Associated Degradation of HMG CoA Reductase
… results from its sterol-induced binding to ER membrane proteins called Insig-1 and Insig-2. This binding allows for subsequent ubiquitination of reductase by Insig-associated ubiquitin ligases. Once ubiquitinated, reductase becomes dislocated from ER membranes into the cytosol for degradation …
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The selective separation and extraction of metals using membrane technology
… The work contained in this thesis shows the membrane extraction of the metals: Cobalt(II), Nickel(II). Iron(II) and Iron(III) in aqueous media using a polymer “entangled” membrane containing the extractant Aliquat 336 and PVC (polyvinylchloride).
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Extraction study of cadmium (II) and copper (II) using Aliquat 336
… dissertation focuses on the investigation of the extraction of Cd(II) and Cu(II) from hydrochloric acid solutions using Aliquat 336 in Shellsol A B solvent and Aliquat 336/PVC membranes. In the solvent extraction study, factors that affect the extraction rate, such as the extractant concentration …
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Protein quality control in the mammalian endoplasmic reticulum
… and their degradation. For secretory and membrane proteins, folding occurs in the endoplasmic reticulum (ER), but degradation is performed by the cytosolic proteasome. Thus, quality control in the secretory system includes the dislocation of misfolded proteins from the ER to the cytoplasm. …
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Solid phase micro extraction: an alternative technique for the determination of volatile orgnanic compounds in groundwater
… and ease of automation: The solid phase micro extraction (SPME) process has two steps: partitioning of analytes between the coating of a SPME fibre and the sample matrix, followed by desorption of concentrated extracts directly into an analytical instrument. In the first step, the coated fibre …